Hey guys I'm sharing a link to my youtube video below but basically im having issues with my 4runner constantly having to downshift to maintain a highway speed.
Video is on flat ground, no wind. It doesn't matter if I run cruise control or not, it acts the same way with cruise control off and myself controlling the throttle.
Transmission shifts good, truck just acts like it doesn't have enough power in overdrive to maintain the speed so it slows down and then has to downshift to get back up to speed, shifts back into overdrive once back up to speed, and then speed bogs down and it has to downshift to speed back up. This occurs over and over again on the highway. Definitely worsened with hills/head wind but it does this even on flat surfaces with no wind.
My dads 2000 has absolutely no issues cruising in overdrive. His can drive into a wind and easily still maintain speed without his transmission downshifting at all. Both of us have 4.30 gears and similar sized tires.
I do have 33s and a lift, otherwise stock BUT THIS ISSUE WAS STILL HAPPENING WHEN I WAS ON 31S WITH NO LIFT.
Engine acts like it has plenty of power accelerating, just has issues cruising in overdrive.. I have done a full tuneup plugs, wires, fuel filter, Cleaned air filter, cleaned throttle body and MAF sensor. Still has the issue. I have been having this issue for a long time so any help or ideas is appreciated. Thanks guys!
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YouTube
YouTube